thumb|right|The band after a concert The Tiger Lillies are a British musical trio formed in 1989 by singer-songwriter Martyn Jacques. Described as the forefathers of Brechtian Punk Cabaret, the Tiger
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af9f2926dc9ec72320920d621a9ced2e210a197cd870a62547d8344fa080fea. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67bbfa7c-3f4d-4373-92a4-a0692338d7c8.json and https://artists.proofprofile.net/proofs/artist/67bbfa7c-3f4d-4373-92a4-a0692338d7c8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519ca37e4a1969fec18161bd54adc9d0bd32996622ffeea692ddf428f3c76690. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561332371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad2bcbcad5a0ada60ab066f4a98f8ce473868000837e17f2214610a359a9dea. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561332380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25922522f42cb7c9919b5d0b1b26d940a21c182df4babb504f9594feb48c8ba7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561332388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98b3418ed0c992176c7bca543a59586e187875a9183ef5334e776cf10c4ad30. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561332524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb517bcb90e3f95544e18707b61a88dd42e116e95b59a1eeb79942bf1aba3f090. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF1494985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fb4c2a80e08ef5d00f8778c0850451a0d2b9122df5a72138c42b6a0c8eb452. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF1494989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16668c0dd2514524e5f9a01310b65b14756bf81b6ba338b54946304027a18c5e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF1494990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ffd4fec09b5f017718ee76ef985e657f96b1e9a3448fbdab277b2c88517872. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF1494995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332354c94e1c7cd9b41ed6e24b3fef70b5173a52c9bffbae53899d3e66a1f6ff. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561332567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1a3bcbec9f189520e802469d7531d9eaf7d922011ee2fe35d033033ff5379e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561313630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a3ce7e11a044a6573f6d68969252c60a1fbe5aaae7917f924d4345acc8abd5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561313631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93e7be29b803edab13dac180a8ad336a768d3e78ed6c4d180f0bd574cd42b9d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561313633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a0bc9fad01ad32459ff350df16d0b06394286347d4451725069bd27bbb9b47. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561313644.
Die Weberischen - A black Musical Comedy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a83ba4dc069928c09800bc72a4db1e71488cf77919e58de575aae376075f723. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561344264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f7d74f0246219911c561be96571d87aa9be879e457a127be5f1629474cdc93. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:08:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561340807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c94cdaa26c8163f3974bedb3c5c61c79b0d65cddd37dc42a6fe08288a485c26. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561340810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb04e12782e4013ac4e41787ac5095518f877ec703121393a1c338c9587d6e85. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561340812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf49b71c6668aa843c9895a674c70b0badaf5daf0d38cb02b93b5cd8463fc88. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA370955602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680e38501bf9fac10b72197534878be57dbb258cc0298c1b7c127ac293921124. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA370955604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b36c92ebe0d8af9df398be198e0feaccbce2b9d1701ed2bda0cf10bccbb4d77. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T18:51:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA370955607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2068d274d4a5716f3aaeac373cd2ad7cb3cf54769f149c309a8e14dda6f3c77e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:11:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA370955609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fb639f68c2329c5c7ad6b622679c408a7ec30a9a171d4ebca240c27a5f6bea. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561233918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca7dec74cd9afc10b5551d862bfc7692a1195d82a8dc2cc2f41567c17fab8e9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561236361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b798592431b7dd51a0efdcf30f0a29870ccd3be4c4422c1ed8caab3cd2057ce. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561236367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfa367a0545a40571ee6a3ad1ea7da2db9f2e5331bfe301987bd398d28440e6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCRG1600209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d18b56b6c80dc2abe06a940a37957e7f1e0e4e2e43b7d53a777229623913e8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:06:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCRG1600402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1609deda0c49e16bd7dcc61e82af0095c63dfc4617952eeaf74dd1de3bcd472. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCRG1600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53395daad040d25fc951449a7faca57593c60c7847e736f66edb72f7681751f3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCRG1600408.
Edgar Allan Poe's Haunted Palace, Featuring the Tiger Lillies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e68a3c9f0ffc81ca67f95f2c2f49d2db2c7b55041144bf555c69c03356f8da. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6N21707224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28317170c051878a454e81c90ed56991fc403ea493b801cd6f14c31af24af50e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6N21707225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6530acc3c99ef7698347a2cfe329e016cae592992752ebd55cc556add4ce9f5f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCRG1800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121665fb601d1dd6bffa9f5a4fa39a9398f5af1126d085acc09fa5d66d190d8b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCRG1800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc025210d8ca87d871d3958f2b031a22dc626b3ea210478544f8a993ad49ea5c4. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2371381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201f8cb4c78caf8c9a59e6b7eb017086367f1b8d912c6cb47f3acd00c20c8cf9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2371384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caa5e3d5fcf0477416afb3e39c1102200095fdbaa986c0557aae5c5441e2815. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA72463371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa35be155eb7736f6f9a3961e98aaf15e3efd558238fbbad155f8c823914edda. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA72463374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7b904f43404be3c40b4c941c0d568da5e3b9741879f362f9f1af6f7a003e19. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA72463367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fb4ec86c4dc1a27e49d1936e0004dc925fc71a6e9aab54ea3e8a5cd30c90d9. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA72463365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5028964529aec478938242ec734f500878920b7cfe9d5f9fad09f59dfa48d137. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA72463372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ef09a51fb52521d375ca7bf08c26283f7be3741078faaec346e3b97988190b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB2MA9901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca5ddb40c4c888a83b724e84b36ba182885c834a87943024a5798bc16201bbe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATT471100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528585386c509c7041f18eb752df6c826813d612e8e547723a18f7135008bdcc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATT471100103.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3fe2ee7d206fd28a7a94e804091fd8e201d2231b2d9c711d7256effd6a2fb2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATT471100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5535f894bf2f4dd19eff5ae88a3e18888c1fd612707872e5b376caefee6ee437. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATT471100109.